Refractory Bricks vs Insulation Bricks

Refractory Bricks vs Insulation Bricks

Blog Article

Refractory bricks and insulation bricks are two types of refractory materials used in high-temperature environments, but they have significant differences in performance, use, and physical and chemical properties.

The difference between physical and chemical indicators

1.Thermal conductivity:
The thermal conductivity of insulation bricks is generally between 0.2-0.4 w/m.k.
The thermal conductivity of refractory bricks is above 1.0 w/m.k.
This means that the insulation performance of insulating bricks is better than that of refractory bricks.
2.Fire resistance temperature:
The refractory temperature of insulation bricks is generally below 1400 degrees Celsius.
The refractory temperature of refractory bricks can reach more than 1500 degrees, and some can even reach 1700-1800 degrees Celsius.
3.density:
The density of insulation bricks is generally 0.8-1.0 g/cm³.
The density of refractory bricks is above 2.0 g/cm³.

The higher the density, the denser and stronger the material is usually.

Differences in usage location

1.Insulation bricks:

It is mainly used to preserve the temperature of high-temperature kilns, such as the insulation layer of furnace roofs and furnace walls.
Its main functions are thermal insulation, heat insulation, energy saving, and reduction of heat energy waste.

2.Refractory bricks:

Usually used in key parts of industrial kilns, such as thermal boilers, glass kilns, cement kilns, fertilizer gas furnaces, blast furnaces, hot blast furnaces, coking furnaces, electric furnaces, etc.
It can withstand high temperatures and erosion, and has high mechanical strength and chemical stability.

Performance and use

1.Insulation bricks:
It has low thermal conductivity and low heat melt, making it ideal for thermal insulation.
It has low impurity content and high refractoriness, and maintains good performance especially in reducing atmosphere.
It has high hot compressive strength, precise appearance and dimensions, and can be processed into special shapes.
2.Refractory bricks:
It has high fire resistance and can withstand extremely high temperatures.
It has good chemical stability and does not react chemically with materials.
It is suitable for conversion furnaces, reforming furnaces, hydroconverters, desulfurization tanks and methanation furnaces in fertilizer plants, as well as hot blast furnaces and heating conversion equipment in the steel industry.

in conclusion
Although refractory bricks and insulation bricks may be similar in shape, there are obvious differences in usage occasions and physical and chemical indicators. During the construction of a high-temperature kiln, choosing the right materials is crucial. Insulation bricks are mainly used for heat preservation and insulation, while refractory bricks are used in key parts that can withstand high temperatures and chemical attack.